*
For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-
2192
23
10
Trim Pot
Introduction
This guideline will outline a G3 feature that allows a speed reference to be “fine tuned” on the fly via
another reference, called the “trim”. All trim sources mentioned below allow addition to the regular
reference; a +/- trim is available only when using the RR terminal along with Override Control Selection in
the FEEDBACK PARAMETERS GROUP. SPEED REFERENCES ALLOWED: Panel input, 4-20 mA
(IV & CC terminals), speed pot or voltage source (RX terminal), preset speed, or RS485 board. SOME
TRIM SOURCES ALLOWED: Speed pot (RR terminal, +/- trim) or (RX terminal, + trim only), 4-20 mA
(IV & CC terminals, + trim only), or panel (+ trim only). This example will illustrate the connections and
programming necessary to follow a 4-20 mA speed reference while trimming the reference with a +/- trim
from a pot connected to the RR terminal.
Connections
TERMINAL STRIP
ST CC F CC
IV CC PP RR CC
4-20 mA Source Speed Pot
Programming
Group
Parameter
Value
UTILITY PARAMETERS
Blind Function Selection
1
UTILITY PARAMETERS
Feedback Control Parameters Blind
1
FEEDBACK PARAMETERS
Override Control Selection
7
FEEDBACK PARAMETERS
Override Multiplier Input Selection
1
FEEDBACK PARAMETERS
Override Change Multiplier
10*
* Adjustable from –100.0% to +100.0%
